[maemo-users] N900 GPS Recalibration

[From: Antti Vähä-Sipilä]

> ...or is GPS just inherently less accurate for height than it is for latitude/longitude?

Here is an article that could be helpful. It's about an upcoming GPS satellite reorg, but the pictures show how different lat/lon and vertical accuracies are. (Scroll down to Horizontal Accuracy and Vertical Accuracy.)

http://blogs.agi.com/navigationAccuracy/?p=315

Some explanation of the issues affecting altitude accuracy: 

http://weather.gladstonefamily.net/gps_elevation.html